"Precedent"?
Unknown exactly what phraseology the questioner is seeking. Common law is based on precedent (legal principles developed in earlier case law) instead of statutory (government passed) laws. It is the traditional law of an area or region created by judges when deciding individual disputes or cases. Common law changes over time.
The term of "Test Case" is a legal term. A test case is a legal case which sets precedent for other cases which have the same question of law involved.
Intellectual property law is a broader term. You might also use the specific name of the law in your area.
The nominative case is a grammatical term indicating that a noun or pronoun is the subject of a sentence or clause; another term for subjective case.
a case in which the Supreme Court's decision greatly alters the interpretation of a law
A court
Mandates Statutes. Codes.
Another term in the United States for competition law is Anti-trust law. You can get information about this at the Wikipedia. Once on the website, type "Competition law" into the search field at the top of the page and press enter to bring up the information.
In the context of a court case, the term "held" signifies the decision or ruling made by the court on a particular legal issue or point of law. It indicates the outcome or conclusion reached by the court in a specific case.
"Laws" are not derived from "case law" - DECISIONS are derived from case law.
There are two ways you can have a sister-in-law. In one case, her sister is also your sister-in-law and in the other she is not. Your sister-in-law can be the sister of your spouse. Then your sister-in-law's sister is either your wife or is also your sister-in-law. Your sister-in-law can also be the wife of your brother. In that case, your sister-in-law's sister is not related to you.
The term that refers to the body that decides a case of law or the place where it is decided is "jurisdiction." Jurisdiction can denote both the authority of a court to hear a case and the geographical area or scope within which that authority is exercised. It encompasses various levels, such as local, state, and federal jurisdictions, depending on the legal matter at hand.